Acid guard



Sept. 3, 1935. R, PETERSON 2,013,219

AC ID GUARD Original Filed April '7, 1928 2 Sheets-Sheet l gwventoz WW 5. Petemmz/ Sept. 3, 1935. H. R. PETERSON ACID GUARD Original Filed April '7, 1928 2 Sheets-Sheet 2 gwventoz Patented Sept. 3, v193.5

A UNITED STATES PATENT orrics ACID GUARD Ban: 1!. Peterson, St. Paul, Minn.

Application April 7 1928, Serial No. 268,332 Renewed April 23, 1934 3 Claims.

working up to the terminal post and connection and causing corrosion of the same.

A feature of the invention resides in' anacid guard carried by the terminal post of the battery which is provided with fiangemeans to prevent the acid from working along under the guard to the top of the same and to the connector secured to the battery post.

My invention also includes the means and method of attaching an acid guard to a battery terminal post in a simple and-effective manner. The method consists in cutting off the post, then positioning my acid guard on the cut-oil post and forming a new post integrally with the acid guard and projecting upward from the same.

An object of my invention is to provide an acid guard having a recess wherein a felt washer which is treated witha lubricant may be maintained or the recess may contain a'lubricant which is a repellent of corrosive substance and acid.

It is also an object of my invention to provide an acid guard having a flange extending toward the flller plugs of the battery to guard against acid from the openings of the battery coming in contact with the upper surface of the guard plate.

My invention includes the integrally connecting of an acid guard plate member above the cell of the battery and provided with depending flange members which may be sealed into the sides of the cell and across the cover of the same, thereby preventing the acid which may work up around the stem of the post from coming out on to the top of the acid guard plate owing to the depending flange members and the integral connection of the plate with the post.

These features, together with other objects and details of the invention will be more fully and clearly set forth in the specification and claims.

In the drawings forming a part of my specification:

Figure 1 is a perspective view of my acid guard.

Figure 2 is a plan view of a battery wherein my acid guards have been used on the same.

Figure 3 illustrates a detail showing the first step of my method of attaching my acid guard to a battery terminal post.

Figure 4 is a detail showing the second step of my method of attaching the acid guard to the battery post.

Figure 5 is a detail showing the third and final step of attaching my acid guard to a battery terminal post.

Figure 6 is a perspective .view of another form of my acid guard.

Figure 'l is a detail section of one form 'of my acid guard.

' Figure B is a perspective view of a portion of the top of a battery showing a different form of my acid guard.

Figure 9 is a perspective under view of the acid guard illustrated in Figure 8.

Figure 10 is a section of my acid guard used as oi the construction illustrated in Figures 8 and 9.

Figure 11 is a plan view of a portion of a storage battery showing the groove wherein the depending flanges of the acid guard illustrated in Figures 8, 9 and 10 is adapted to fit.

In the drawings my acid guard A is made of lead or other suitable acid resisting material and is provided with a plate Ill adapted to. extend normall horizontally when the guard A is attached o the storage battery B. i

The acid guard A is formed with an upwardly extending side flange II which is adapted to be positioned adjacent the filling plug it of the battery B.

The plate iii of the acid guard A is formed with annularly depending flange portions l3 and H which are positioned concentrically and which extend below the plate It. The upper surface of the plate I0 is formed with an annular projecting flange I5, while a boss portion l6 extends about the central opening il formed axially in the plate It.

In attaching my acid guard A, which can be attached to any battery, old or new, I accomplish the same in the method which consists as follows: The terminal post l8 of the battery B is cut off as illustrated in Figure 3. The cut-oif portion of the post I8 is illustrated in dotted outline. After the terminal post it is cut off I then place my acid guard A upon the post resting upon the lock nut IS with the lower edges of the acid guard flanges i3 and it away free of the upper surface of the battery 13.

After the acid guard A is in position on the stub of the post I8, I then form the upper portion I8 on to the stub of the post l8, connecting the portion I8 integrally with the guard A, as illustrated in Figure 5. This is the flnal operation in carrying out my method and provides an acid guard A of a nature to prevent acid from working up along the post l8 and from the top surface 20 of the battery to the top of the plate Hi. If any of the acid working up along the post I8 from the battery cell should crawl up to the. under surface of the plate Iii, the flange members l3 and H virtually prevent the acid from working from the bottom surface of the plate Hi to the top surface adjacent the connector which is ordinarily attached to the battery post l8 and which is not illustrated in the drawings.

In practical use I have found my acid guard A to keep the upper end of the post I8 of the battery B entirely dry and free from acid corrosion which ordinarily gathers about the connector and post and which does considerable damage to the battery. My acid guard A is carried freely by the post so as to move slightly with the same and yet is integrally sealed therewith so as to become and form a part virtually of the post with a broad wide surface in the plate in forming a substantial guard with the depending flanges l8 and H to prevent acid from working to the top of the same.

In Figure 6 I have illustrated an acid guard A of a simple nature having a comparatively thin flat plate ill, circular in formation and having an upper boss l6 about the opening Ill. The guard II in this form of the plate is illustrated with the outer periphery of the plate In and thus I provide an acid guard A which is connected integrally in the same manner as I have illustrated in Figures 3 to 5, inclusive, with the battery post ll to provide a guard to prevent acid from working to the top of the post in use. This guard is made of lead or other suitable acid resisting material.

I have illustrated another form of my plate A in Figure 7 which is provided with a smooth under surface 22, the same as the plate illustrated in Figure 6. In this acid guard A the flange II is formed with an inwardly extending upper guard portion II and the flange H is otherwise of the same nature as the flange I i of Figure 1. The upper surfaceof the plate ID in the guard A of Figure 7 is formed with the annular flange l and the recess between the flange I5 and the boss I is adapted to support a felt washer 23 which is saturated with a lubricant or other oil resisting material. Obviously the recess wherein the washer 23' rests may be filled with oil or grease to provide an acid repellent if it is desired.

My acid guard A may be made in the form illustrated in Figures 8 to 10, inclusive, and in this form the guard A is of. a substantially rectangular nature with a smooth top surface 24 anda smoothunder surface 25. Projecting from the upper surface I provide the guard plate II which is positioned adjacent the filling plugs l2, as illustrated, and projecting from the lower surface I provide a peripheral flange 26 about the guard A. The battery B is formed with a groove 21 into which the flange 26 is adapted to fit.

The plate A in the construction of Figures 8 to 10 inclusive, is secured to the terminal post l8 by building up the upper portion l8 of the same with m same method as described in Figures 3 to 5 inclusive, to integrally connect the top l8 of the terminal post with the battery guard A.

Thus I provide a battery guard for terminal posts which is adapted to extend about the post in a manner to form a shield and guard to prevent the acid from the battery cell working up along the post to the top of the same where it will contact with the connector which is ordinarily attached to the post. I have found that my acid guard will keep the upper part of the terminal posts I8 of the battery entirely free of acid and thereby provide a very desirable means for preventing corrosion on storage battery connecting posts. This is quite important in the use of storage batteries in the home where they are connected with radios as it overcomes the undesirable corrosion about the connectors.

In accordance with the patent statutes I have described the principles of my acid guard and whileI have illustrated and endeavored to set forth the best embodiment thereof, the drawings and description are only illustrative of a means of carrying out the same and I desire to have it understood that obvious changes and other adaptations may be accomplished within the scope of the following claims without departing from the spirit of the invention.

I claim:

1. The combination, a storage battery, a sealed surface thereon, a filler plug thereupon, a terminal post adjacent said filler plug, a guard plate on said post, parallel with the sealed surface of the battery and spaced therefrom, a series of annular flanges about said post extending downwardly from said guard plate into close proximity with but spaced from the battery sealed surface, an upwardly extending flange about said post on 'said guard plate, an upstanding splash guard on said guard plate on the portion thereof next adjacent the flller plug, and open sides on said guard plate to provide free access to the terminal adapted to be positioned on said post.

2. The combination, a storage battery, a sealed surface thereon, a filler plug thereon, a terminal post adjacent said plug, a rounded flat guard plate on said terminal post disposed parallel with and in spaced relation to said sealed surface, a splash guard upstanding along a portion of the edge of said guard plate adjacent said filler plug, leaving the rest of the edge open to provide free access to place a terminal on said post, and upwardly and downwardly extending flanges on said flat guard plate surrounding said terminal post.

3. The combination of a storage battery, a sealed surface thereon, a filler plug thereon, a terminal post adjacent said plug, a flat guard plate on said terminal post, a splash guard upstanding along a relatively short portion of the edge of said guard plate adjacent the filler plug leaving the rest of the edge open to provide free access to place a terminal on said post, and a slanting upper extremity on said splash guard extending inwardly of said guard plate.

HANS R. PETERSON. 

